sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame^] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Profiling machinery -- not for release builds! ---*/ |
| 4 | /*--- vg_profile.c ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
| 8 | This file is part of Valgrind, an x86 protected-mode emulator |
| 9 | designed for debugging and profiling binaries on x86-Unixes. |
| 10 | |
| 11 | Copyright (C) 2000-2002 Julian Seward |
| 12 | jseward@acm.org |
| 13 | Julian_Seward@muraroa.demon.co.uk |
| 14 | |
| 15 | This program is free software; you can redistribute it and/or |
| 16 | modify it under the terms of the GNU General Public License as |
| 17 | published by the Free Software Foundation; either version 2 of the |
| 18 | License, or (at your option) any later version. |
| 19 | |
| 20 | This program is distributed in the hope that it will be useful, but |
| 21 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | General Public License for more details. |
| 24 | |
| 25 | You should have received a copy of the GNU General Public License |
| 26 | along with this program; if not, write to the Free Software |
| 27 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 28 | 02111-1307, USA. |
| 29 | |
| 30 | The GNU General Public License is contained in the file LICENSE. |
| 31 | */ |
| 32 | |
| 33 | #include "vg_include.h" |
| 34 | |
| 35 | #ifdef VG_PROFILE |
| 36 | |
| 37 | /* get rid of these, if possible */ |
| 38 | #include <signal.h> |
| 39 | #include <sys/time.h> |
| 40 | |
| 41 | #define VGP_PAIR(enumname,str) str |
| 42 | static const Char* vgp_names[VGP_M_CCS] = { VGP_LIST }; |
| 43 | #undef VGP_PAIR |
| 44 | |
| 45 | static Int vgp_nticks; |
| 46 | static Int vgp_counts[VGP_M_CCS]; |
| 47 | static Int vgp_entries[VGP_M_CCS]; |
| 48 | |
| 49 | static Int vgp_sp; |
| 50 | static VgpCC vgp_stack[VGP_M_STACK]; |
| 51 | |
| 52 | void VGP_(tick) ( int sigNo ) |
| 53 | { |
| 54 | Int cc; |
| 55 | vgp_nticks++; |
| 56 | cc = vgp_stack[vgp_sp]; |
| 57 | vg_assert(cc >= 0 && cc < VGP_M_CCS); |
| 58 | vgp_counts[ cc ]++; |
| 59 | } |
| 60 | |
| 61 | void VGP_(init_profiling) ( void ) |
| 62 | { |
| 63 | struct itimerval value; |
| 64 | Int i, ret; |
| 65 | |
| 66 | for (i = 0; i < VGP_M_CCS; i++) |
| 67 | vgp_counts[i] = vgp_entries[i] = 0; |
| 68 | |
| 69 | vgp_nticks = 0; |
| 70 | vgp_sp = -1; |
| 71 | VGP_(pushcc) ( VgpRun ); |
| 72 | |
| 73 | value.it_interval.tv_sec = 0; |
| 74 | value.it_interval.tv_usec = 10 * 1000; |
| 75 | value.it_value = value.it_interval; |
| 76 | |
| 77 | signal(SIGPROF, VGP_(tick) ); |
| 78 | ret = setitimer(ITIMER_PROF, &value, NULL); |
| 79 | if (ret != 0) VG_(panic)("vgp_init_profiling"); |
| 80 | } |
| 81 | |
| 82 | void VGP_(done_profiling) ( void ) |
| 83 | { |
| 84 | Int i; |
| 85 | VG_(printf)("Profiling done, %d ticks\n", vgp_nticks); |
| 86 | for (i = 0; i < VGP_M_CCS; i++) |
| 87 | VG_(printf)("%2d: %4d (%3d %%%%) ticks, %8d entries for %s\n", |
| 88 | i, vgp_counts[i], |
| 89 | (Int)(1000.0 * (double)vgp_counts[i] / (double)vgp_nticks), |
| 90 | vgp_entries[i], |
| 91 | vgp_names[i] ); |
| 92 | } |
| 93 | |
| 94 | void VGP_(pushcc) ( VgpCC cc ) |
| 95 | { |
| 96 | if (vgp_sp >= VGP_M_STACK-1) VG_(panic)("vgp_pushcc"); |
| 97 | vgp_sp++; |
| 98 | vgp_stack[vgp_sp] = cc; |
| 99 | vgp_entries[ cc ] ++; |
| 100 | } |
| 101 | |
| 102 | void VGP_(popcc) ( void ) |
| 103 | { |
| 104 | if (vgp_sp <= 0) VG_(panic)("vgp_popcc"); |
| 105 | vgp_sp--; |
| 106 | } |
| 107 | |
| 108 | #endif /* VG_PROFILE */ |
| 109 | |
| 110 | /*--------------------------------------------------------------------*/ |
| 111 | /*--- end vg_profile.c ---*/ |
| 112 | /*--------------------------------------------------------------------*/ |